Printing press



C. F. LANG PRINTING PRESS Filed May 27, 1927 ATTORN EY Patented Dec. 25,1928.

UNITED STATES (mam F. LANG,-F CHICAGO, ILLINOIS.

rnm'rme ranss.

Application filed May 1927. Serial No. 194,777.

This invention relates to certain novel improvements in printing pressesand more particularly to a device adapted'to be used in connection withthe so-called feed roller.

In printing, presses of the prior art, the feed roller, which is theroller that carries the ink to the ink plate, has been carried onswinging arms and has been caused to rotate by frictional engagementwith a member over which it is adapted to move. In the past, thismemberhas been covered with a material such as leather, and oil, ink,and other foreign matter collected on this member and reduced theefficiency thereof to such a oint that the member ceased to function.ince the frictional engagement between this member and the roller isadapted to be such that the roller will rotate when passed over thismember, it is apparent that if this member becomes slippery, such actionwill not take place.

It is therefore the salient object of my invention to provide a memberwith which the feed roller is adapted to have frictional engagement thatwill embody an arrangement whereby adegree of friction may be mamtainedthat will cause the feed roller to rotate under all conditions. r I

A further object of the invention is to sub- 30 stitute in place of theusual leather, a material which will be impervious to oil, ink, andother foreign matter.

Other objects will appear herelnafter.

The invention consists in the novel combination and arrangement of partsto be hereinafter described and claimed.

The invention will be best understood by reference to the accompanyingdrawings, showing the preferred form of construction and in which:

Fig. 1 is a fragmental front elevational view of a printin press showingthe feed roller and its relation to the ink plate;

Fig. 2 is a side view, partly in elevation and partly in section, of theparts of the device shown in Fig. 1; and v Fig. 3 is a perspective viewof the preferred embodiment of my improvement.

In the drawings wherein the preferred embodiment of my invention isillustrated, it-

vided. This plate 12 reciprocates from the end of the press at whichtheimpression plates are carried to the end of the press depicted in thedrawings. In order to carry the ink from the fountain roller 11 to theplate 12 the feed roller 13 is provided. Sup

porting arms 14 are pivotally mounted at 15 a and are adapted to movethe roller 13 from the full line position in Fig. 2 to the dotted lineposition in this figure. r

l/Vhen the ink plate12'is occupying the 2 full line position in Fig. 2the feed roller and its supporting arms are occupying the full lineposition in this figure. As the plate 12 moves toward the fountainrollerll the arms 14 move the roller 13- up to the dotted line positionand when occupying this posi- 4 tion the roller 13 willbe in engagementwith the upper surface of the plate 12. Since the feed roller 13 engagesthe fountain roller 11 it is apparent that a film of ink will bepresenton the feed, roller and thereforewhen this roller contacts with theplate 12 a film oi. ink will be placed on the plate. As the plate 12moves rearwardly it passes under a plurality of so-called distributingrollers 16 which tend to spread the ink evenly over the surface of theplate 12 so that the ink will be supplied to all points on theimpression plates evenly.

It is necessary that different points on the feed roller 13 engage thefountain roller 11 and the plate 13 during the various phases ofoperation. If this does not take'place the feed roller 13 does notproperly convey the ink to the plate 12, since the film of ink on thisroller will be broken up very thoroughly at the same point. In orderthat the feed roller will contact with these members at difierentpoints, it is necessary that this roller be rotated during its upwardmovement. In order to accomplish this, a strip such as 17 is provided.As can be seen by referring to Fig. 1 the feed roller 13 is mounted on ashaft 18 and the portion 19 of this shaft which pro trudes beyond thefeed. roller 13 engages the strip 17. Preferably the strip 17 is made ofbrake lining material although this is not necessary.

One end of the strip 17 is rigidly secured to the bracket 20 whichembodies a foot portion 21 over which the strip 17 is directed. At theother end of the strip 17 a securing element 22 is provided and rigidlyfastened to this securing element is the downwardly protruding rod 23that extends through a portion 241 of the bracket 20. A spring'25 isprovided between the portion 24 and securing element 22 that is adaptedto be compressed when the securing element 22 moves downwardly. At thelower end of the rod 23 a nut 2'? provided and a spring 26 extendsbetween this nut and the portion 24, said spring 26 acting in oppositionto the spring 25. In order to insure contact between the portion 19 ofthe shaft 18 and the strip 17, a plurality of leaf springs 28 areprovided between the strip 17 and the foot portion 21 of the bracket 20.These-deaf springs are held in posit-ion by the securing elements whichsecure the strip .17 to the bracket 20. As the shaft 18 moves upwardlythe portion 19 will engage the strip 17 that is forced outwardly by theleaf springs 28 and therefore since the degree of friction between thesemembers is high, good contact is issued and therefore the feed roller 18will be caused to rotate for the purpose brought forth heretofore. Dueto the resilient mounting of the strip 17 it is apparent that the leafsprings 28 will be able to function in a proper manner.

It is apparent from the foregoing that I have provided a device whichwill insure rotation of the feed roller 13 during each operation thereofand therefore ink will be supplied to the plate 12 in proper amounts.

WVhile I have illustrated and described the reoavvo preferred form ofconstruction for carrying my invention into efiect, this is capable ofvariation and modification, without departing from the spirit of theinvention. I, therefore, do not wish to be limited to the precisedetails of construction set forth, but desire to avail myself of suchvariations and modifications as come within the scope of the appendedclaims.

Having thus described my invention what I claim as new and desire toprotect by Letters Patent is: I i

1. In combination, an ink plate, a fountain roller, a feed rollermounted for swinging movement adapted to carry ink from said fountainroller to said plate, a shaftsupporting said feed roller, means adaptedto frictionally engage said shaft to cause rotation thereof during saidswinging movement, said means embodying a resilient portion formaintaining the frictional engagement be tween said engaging means androller.

2. In combination, a shaft carrying a feed roller, a strip across whichsaid shaft is adapted to roll, a bracket to which one end of said stripis rigidly secured, the other end of said strip being yieldably secured,and means carried by said bracket forcing said strip into engagementwith said shaft.

3. A device of the class described, including, in combination, abracket, a strip, one end of said strip being secured to a memberprotruding through said bracket for sliding movement therein, resilientmeans for tensioning said strip, and other resilient means carried bysaid bracket acting on the midportion thereof forcing said strip awayfrom said bracket.

In testimony whereof I affix my signature.

OHARLE S F; LANG.

